I always thought the same thing myself. I am always skeptical about everything anyway. Unless photo matched how do we really know who used anything?
Does Steiner get the bats directly from players or from the locker room/bat rack? Anyone player could use these at anytime or not at all.
I can only go with the cert I have. Being that I obtained the bat at a very good price getting the cert renewed was good enough for me.

Players are always using different bats. I think Andujar used Castros bat for a ling time.